Understanding salary tax in Japan can be confusing because your tax is not calculated directly on your gross salary. Japan first applies employment income deduction, social insurance deductions, basic deductions, national income tax, reconstruction surtax, resident tax, and other payroll-related deductions.

This guide explains how Japan income tax brackets work and estimates the annual and monthly take-home salary for fixed annual salaries of ¥14M, ¥15M, ¥16M, ¥17M, and ¥18M.

Important Assumptions Used in This Calculation

This calculation is an estimate based on the following assumptions:

This is not a final tax filing calculation. Actual payroll may differ depending on your company’s health insurance provider, bonus structure, municipality, age, dependents, and special deductions.

1. Japan National Income Tax Brackets

Japan uses a progressive income tax system. This means higher income is taxed at higher marginal rates, but only the portion above each threshold is taxed at the higher rate.

JETRO and PwC both list Japan’s progressive individual income tax brackets, including the 33% bracket for taxable income over ¥9M and up to ¥18M. (JETRO)

2. What Is Employment Income Deduction?

Employment income deduction is Japan’s automatic deduction for salaried employees. In simple words, Japan does not tax your full salary directly. First, your gross salary is reduced by a fixed/formula-based amount.

For salary above ¥8.5M, the employment income deduction is capped at:

¥1,950,000

So if your gross annual salary is ¥14M, ¥15M, ¥16M, ¥17M, or ¥18M, your employment income deduction remains ¥1.95M. The National Tax Agency’s withholding guide explains that employment income is calculated as salary, wages, and bonuses minus the employment income deduction; PwC also lists the deduction cap at ¥1.95M. (National Tax Agency)

Formula:

Salary income = Gross annual salary − Employment income deduction

Example for ¥15M:

¥15,000,000 − ¥1,950,000 = ¥13,050,000

3. Basic Deduction Used for This Income Range

For this salary range, after employment income deduction, total income is still above ¥6.55M and below ¥23.5M. Therefore, the national income tax basic exemption used here is:

¥580,000

For local inhabitant tax, the basic exemption used is generally:

¥430,000

PwC’s 2026 Japan deduction table shows the national personal exemption as ¥580,000 for total income over ¥6.55M and under ¥23.5M, with the local inhabitant tax exemption shown separately. (PwC Tax Summaries)

4. Other Deductions and Taxes Included

This estimate includes:

Japan’s reconstruction surtax is 2.1% of national income tax, and local inhabitant tax is generally 10%, plus a small per-capita amount depending on municipality. (JETRO)

For Tokyo Kyokai Kenpo, the 2026 health insurance rate shown is 9.85% total, with employee and employer sharing the burden, and the child/childcare support rate is 0.23% total. Long-term care insurance of 1.62% applies to people aged 40–64, so it is excluded here under the “under 40” assumption. (Kyoukaikenpo)

Employees’ Pension Insurance contributions are shared equally between worker and employer, and the contribution is calculated based on standard monthly remuneration and standard bonus amount. (Nenkin)

5. Estimated Take-Home Salary Table: ¥14M to ¥18M

6. Which Tax Bracket Do You Fall Into?

For all the above salaries, after normal deductions, the estimated national taxable income is above ¥9M and below ¥18M.

That means the national income tax marginal bracket is:

33%

However, this does not mean your full salary is taxed at 33%. Only the taxable portion above the lower bracket threshold is taxed at the higher marginal rate. Japan uses progressive taxation, so the earlier portions are taxed at 5%, 10%, 20%, and 23% before reaching the 33% band. (PwC Tax Summaries)

7. Simple Monthly Take-Home Summary

8. Example Calculation for ¥15M Salary

Let’s take a fixed gross salary of ¥15,000,000.

Step 1: Apply employment income deduction

¥15,000,000 − ¥1,950,000 = ¥13,050,000

Step 2: Deduct estimated social insurance

¥13,050,000 − ¥1,541,700 = ¥11,508,300

Step 3: Deduct national basic deduction

¥11,508,300 − ¥580,000 = ¥10,928,300

Estimated national taxable income:

¥10,928,300

Step 4: Apply 33% income tax bracket

¥10,928,300 × 33% − ¥1,536,000 = ¥2,070,339

Step 5: Add 2.1% reconstruction surtax

¥2,070,339 × 102.1% = approx. ¥2,113,816

Step 6: Add estimated resident tax

Resident tax is estimated separately at around 10% of local taxable income, plus a small fixed per-capita amount.

Estimated resident tax:

Approx. ¥1,112,830

Step 7: Final take-home

¥15,000,000 − ¥1,541,700 − ¥2,113,816 − ¥1,112,830
= approx. ¥10,231,654 per year

Average monthly take-home:

¥10,231,654 ÷ 12 = approx. ¥852,638/month

9. Key Takeaways

If your fixed annual CTC in Japan is between ¥14M and ¥18M, your national income tax bracket will most likely be 33% after normal deductions. But your actual take-home salary will not drop by 33% of gross salary because Japan calculates tax on taxable income, not gross income.

A practical estimate is:

¥14M gross → around ¥808K/month net
¥15M gross → around ¥853K/month net
¥16M gross → around ¥897K/month net
¥17M gross → around ¥942K/month net
¥18M gross → around ¥989K/month net

The biggest deductions are usually:

1. Social insurance and pension
2. National income tax
3. Resident tax

One important point: resident tax is usually based on the previous year’s income, so your first year in Japan, or your first year after a large salary increase, may look different month to month. In steady state, resident tax becomes a major part of monthly deductions. PwC notes that local inhabitant tax is levied on prior-year income for residents as of January 1. (PwC Tax Summaries)

Conclusion

For high-salary employees in Japan, gross salary and take-home salary can look very different. A fixed salary of ¥15M may look large on paper, but after employment income deduction, social insurance, national tax, reconstruction surtax, and resident tax, the estimated monthly take-home is around ¥850K under normal assumptions.

For anyone negotiating salary in Japan, it is better to compare offers using estimated net monthly income, not just annual gross CTC.